a train moving at a constant rate of speed travels 260 miles

a train moving at a constant rate of speed travels 260 miles in 5 hours at this rate how many miles will the train travel in 9 hours

rt=d
r*5=260
r=260/5
r=52 mph
52*9=468 miles in 9 hours
Another way to do this
260/x=5/9
Multiply both sides by x
260=5x/9
Divide both sides by 5
52=x/9
Multiply both sides by 9
9*52=x
which is the same as we calculated above.